I was subscribed to a thread (on the classified ads forum), but decided to unsubscribe as the one item I was interested in had sold. Unfortunately, when I go to the 'Thread tools' drop-down, I still see the 'Subscribe' option but no 'Unsubscribe'. Any ideas? I've tried a full reload of the page and I've tried subscribing again, but nothing helps. I'm using Firefox, if that makes any difference.